The Catto 1 showing occurs in a Triassic to Jurasic syenite plug that intrudes Upper Triassic Stuhini Group rocks. A three centimetre by twenty centimetre pod of bornite is localized along a fracture plane in the syenite. A select sample (32440) of the mineralized pod assayed 1.89 per cent copper with otherwise insignificant base and precious metal values (Assessment Report 21061).

Refer to Trophy (Ptarmigan) (104G 053) for related details and a common work history.